It is possible to know you're gay even if you're a virgin or haven't had a same-sex physical relationship. Being gay isn't just about sex; it is about emotion. Just like straight people, gay people fall in love and have long-lasting, meaningful relationships. Physical attraction is just one indicator of sexual orientation.

I can tell you what my own experience is, I don't know if it is the same for everybody. Although I had sex with a man for the first time when I was in my late 20's it was clear to me that I was gay since I was 12 or 13. It seems very simple to me and I don't understand how people cannot be sure about their sexual orientation. If guys attract you and girls don't attract you, you're gay. Easy.

I can tell you what my own experience is, I don't know if it is the same for everybody. Although I had sex with a man for the first time when I was in my late 20's it was clear to me that I was gay since I was 12 or 13. It seems very simple to me and I don't understand how people cannot be sure about their sexual orientation. If guys attract you and girls don't attract you, you're gay. Easy.

Although you're right, there are familiar and social factors that can "deform" the vision of anyone self-identity

I knew from a very very young age loved and admired men since I was like 6 those feelings continued to get stronger only ever jerked off to gay porn and when I sucked my first dick when I was 14 I think it went from 99% sure to 200% sure lo loved it.

It is possible to know you're gay even if you're a virgin or haven't had a same-sex physical relationship. Being gay isn't just about sex; it is about emotion. Just like straight people, gay people fall in love and have long-lasting, meaningful relationships. Physical attraction is just one indicator of sexual orientation.

This was the only decent answer. All the others just had to do with sex. And just because a guy gets hard watching gay porn or with a guy means nothing. Look at all the closeted gay men that have sex with women constantly. Doesn't mean they are str8 or bi. Its way more then a physical. Its an emotional and physical combination

One can have a physical reaction to others without having to have sex with them, nor even masturbate to their image. A slight tingling 'bout the groin region and so on.

And I mean if you want to be pedantic, can anyone be certain of their sexuality even have they've had sex?

You might have had 80 girlfriends in your life and been happily married to a woman for the last 30 years, never had the slightest reaction to a male in all that time, and then you see Brad Pitt for the first time and get an erection. It's entirely possible that sexual preference is wholly fluid for the majority of us (at the moment of birth), but that there's a lot of pressure and practical benefit to dating the opposite sex so we might never even develop our ability to have interest in our own sex.

Ultimately, it's best to not worry about it. If you like someone, like em. If you don't, don't.

If you want to have sex with a man, have sex with a man. If you then want to have sex with a woman, have sex with a woman. Pursue the relationships you want to pursue. Is it really so important to tick a box on a form. I mean, you don't need a gay license to have sex with men. Or to have permission to pursue a romantic relationship. If that was the case, mine would have been revoked a long time ago. And I'd still be having sex with men. "Fuck the system!"

I second what spam17 said. "Ultimately, it's best to not worry about it. If you like someone, like em. If you don't, don't."

You always hear "I was sure since I was little". .So If you're not sure in that inherent way, I would make it a point to try a man and a woman out. Doesn't matter what kind of porn you watch or even who you have sex with. I am more visually attracted to guys but sexual experiences with them aren't as intense or emotionally charged as when I am with a woman.